package com.tax.common.tool.option.secure.code;

import java.io.FileInputStream;  
import java.io.FileNotFoundException;  
import java.io.IOException;  
import java.security.InvalidAlgorithmParameterException;  
import java.security.InvalidKeyException;  
import java.security.Key;  
import java.security.KeyFactory;  
import java.security.KeyPair;  
import java.security.KeyPairGenerator;  
import java.security.KeyStore;  
import java.security.KeyStoreException;  
import java.security.MessageDigest;  
import java.security.NoSuchAlgorithmException;  
import java.security.PrivateKey;  
import java.security.PublicKey;  
import java.security.SecureRandom;  
import java.security.Signature;  
import java.security.SignatureException;  
import java.security.UnrecoverableKeyException;  
import java.security.cert.Certificate;  
import java.security.cert.CertificateException;  
import java.security.cert.CertificateFactory;  
import java.security.cert.X509Certificate;  
import java.security.interfaces.RSAPrivateKey;  
import java.security.interfaces.RSAPublicKey;  
import java.security.spec.AlgorithmParameterSpec;  
import java.security.spec.InvalidKeySpecException;  
import java.security.spec.PKCS8EncodedKeySpec;  
import java.security.spec.X509EncodedKeySpec;  
import java.util.Date;  
import java.util.HashMap;  
import java.util.Map;  
import java.util.Random;  
  
import javax.crypto.BadPaddingException;  
import javax.crypto.Cipher;  
import javax.crypto.IllegalBlockSizeException;  
import javax.crypto.KeyAgreement;  
import javax.crypto.KeyGenerator;  
import javax.crypto.Mac;  
import javax.crypto.NoSuchPaddingException;  
import javax.crypto.SecretKey;  
import javax.crypto.SecretKeyFactory;  
import javax.crypto.interfaces.DHPrivateKey;  
import javax.crypto.interfaces.DHPublicKey;  
import javax.crypto.spec.DHParameterSpec;  
import javax.crypto.spec.IvParameterSpec;  
import javax.crypto.spec.PBEKeySpec;  
import javax.crypto.spec.PBEParameterSpec;  
import javax.crypto.spec.SecretKeySpec;  
  
public class Encryption {  
  
    /** 
     * MD5算法 
     */  
    private static final String ALGORITHM_MD5 = "MD5";  
    /** 
     * SHA算法 
     */  
    private static final String ALGORITHM_SHA = "SHA";  
    /** 
     * HMAC算法 
     */  
    private static final String ALGORITHM_MAC = "HmacMD5";  
    /** 
     * DES算法 
     */  
    private static final String ALGORITHM_DES = "DES";  
    /** 
     * PBE算法 
     */  
    private static final String ALGORITHM_PBE = "PBEWITHMD5andDES";  
  
    /** 
     * AESkey 
     */  
    private static final String KEY_AES = "AES";  
  
    /** 
     * AES算法 
     */  
    private static final String ALGORITHM_AES = "AES/CBC/PKCS5Padding";  
  
    /** 
     * RSA算法 
     */  
    private static final String KEY_ALGORITHM = "RSA";  
  
    /** 
     * 数字签名 
     */  
    private static final String SIGNATURE_ALGORITHM = "MD5withRSA";  
  
    /** 
     * 公钥 
     */  
    private static final String RSAPUBLIC_KEY = "RSAPublicKey";  
  
    /** 
     * 私钥 
     */  
    private static final String RSAPRIVATE_KEY = "RSAPrivateKey";  
  
    /** 
     * D-H算法 
     */  
    private static final String ALGORITHM_DH = "DH";  
  
    /** 
     * 默认密钥字节数 
     * 
     * <pre> 
     * DH 
     * Default Keysize 1024 
     * Keysize must be a multiple of 64, ranging from 512 to 1024 (inclusive). 
     * </pre> 
     */  
    private static final int DH_KEY_SIZE = 1024;  
  
    /** 
     * DH加密下需要一种对称加密算法对数据加密，这里我们使用DES，也可以使用其他对称加密算法。 
     */  
    private static final String SECRET_ALGORITHM = "DES";  
  
    /** 
     * DH公钥 
     */  
    private static final String DHPUBLIC_KEY = "DHPublicKey";  
  
    /** 
     * DH私钥 
     */  
    private static final String DHPRIVATE_KEY = "DHPrivateKey";  
  
    /** 
     * Java密钥库(Java Key Store，JKS)KEY_STORE 
     */  
    private static final String KEY_STORE = "JKS";  
  
    private static final String X509 = "X.509";  
  
    /** 
     * 信息摘要算法 
     * @param algorithm 算法类型 
     * @param data 要加密的字符串 
     * @return 返回加密后的摘要信息 
     */  
    private static String encryptEncode(String algorithm, String data) {  
        try {  
            MessageDigest md = MessageDigest.getInstance(algorithm);  
            return TranscodeUtil.byteArrayToHexStr(md.digest(data.getBytes()));  
        } catch(NoSuchAlgorithmException ex) {  
            ex.printStackTrace();  
        }  
        return null;  
    }  
  
    /** 
     * 使用MD5加密 
     * @param data 要加密的字符串 
     * @return 返回加密后的信息 
     */  
    public static String MD5Encode(String data) {  
        return encryptEncode(ALGORITHM_MD5, data);  
    }  
  
    /** 
     * 使用SHA加密 
     * @param data 要加密的字符串 
     * @return 返回加密后的信息 
     */  
    public static String SHAEncode(String data) {  
        return encryptEncode(ALGORITHM_SHA, data);  
    }  
  
    /** 
     * 生成HMAC密钥 
     * @return 返回密钥信息 
     */  
    public static String generateMACKey() {  
        try {  
            KeyGenerator keyGenerator = KeyGenerator.getInstance(ALGORITHM_MAC);  
            SecretKey secretKey = keyGenerator.generateKey();  
            return TranscodeUtil.byteArrayToBase64Str(secretKey.getEncoded());  
        } catch (NoSuchAlgorithmException e) {  
            e.printStackTrace();  
        }  
        return null;  
    }  
  
    /** 
     * 使用HMAC加密 
     * @param data 要加密的字符串 
     * @param key 密钥 
     * @return 返回加密后的信息 
     */  
    public static String HMACEncode(String data, String key) {  
        Key k = toKey(key,ALGORITHM_MAC);  
        try {  
            Mac mac = Mac.getInstance(k.getAlgorithm());  
            mac.init(k);  
            return TranscodeUtil.byteArrayToBase64Str(mac.doFinal(data.getBytes()));  
        } catch (NoSuchAlgorithmException e) {  
            e.printStackTrace();  
        } catch (InvalidKeyException e) {  
            e.printStackTrace();  
        }  
        return null;  
    }  
  
    /** 
     * 将base64编码后的密钥字符串转换成密钥对象 
     * @param key 密钥字符串 
     * @param algorithm 加密算法 
     * @return 返回密钥对象 
     */  
    private static Key toKey(String key,String algorithm) {  
        SecretKey secretKey = new SecretKeySpec(TranscodeUtil.base64StrToByteArray(key), algorithm);  
        return secretKey;  
    }  
  
    /** 
     * 生成DES密钥 
     * @param seed 密钥种子 
     * @return 返回base64编码的密钥字符串 
     */  
    public static String generateDESKey(String seed) {  
        try {  
            KeyGenerator kg = KeyGenerator.getInstance(ALGORITHM_DES);  
            kg.init(new SecureRandom(seed.getBytes()));  
            SecretKey secretKey = kg.generateKey();  
            return TranscodeUtil.byteArrayToBase64Str(secretKey.getEncoded());  
        } catch (NoSuchAlgorithmException e) {  
            e.printStackTrace();  
        }  
        return null;  
    }  
  
    /** 
     * DES加密 
     * @param data 要加密的数据 
     * @param key 密钥 
     * @return 返回加密后的数据(经过base64编码) 
     */  
    public static String DESEncrypt(String data,String key) {  
        return DESCipher(data,key,Cipher.ENCRYPT_MODE);  
    }  
  
    /** 
     * DES解密 
     * @param data 要解密的数据 
     * @param key 密钥 
     * @return 返回解密后的数据 
     */  
    public static String DESDecrypt(String data, String key) {  
        return DESCipher(data,key,Cipher.DECRYPT_MODE);  
    }  
  
    /** 
     * DES的加密解密 
     * @param data 要加密或解密的数据 
     * @param key 密钥 
     * @param mode 加密或解密模式 
     * @return 返回加密或解密的数据 
     */  
    private static String DESCipher(String data, String key, int mode) {  
        try {  
            Key k = toKey(key,ALGORITHM_DES);  
            Cipher cipher = Cipher.getInstance(ALGORITHM_DES);  
            cipher.init(mode, k);  
            return mode == Cipher.DECRYPT_MODE?new String(cipher.doFinal(TranscodeUtil.base64StrToByteArray(data))):TranscodeUtil.byteArrayToBase64Str(cipher.doFinal(data.getBytes()));  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
        return null;  
    }  
  
    /** 
     * 生成盐 
     * @return 返回base64编码后的盐信息 
     */  
    public static String generatePBESalt() {  
        byte[] salt = new byte[8];  
        Random random = new Random();  
        random.nextBytes(salt);  
        return TranscodeUtil.byteArrayToBase64Str(salt);  
    }  
  
    /** 
     * PBE(Password-based encryption基于密码加密)加密 
     * @param data 要加密的数据 
     * @param password 密码 
     * @param salt 盐 
     * @return 返回加密后的数据(经过base64编码) 
     */  
    public static String PBEEncrypt(String data,String password,String salt) {  
        return PBECipher( data, password, salt, Cipher.ENCRYPT_MODE);  
    }  
  
    /** 
     * PBE(Password-based encryption基于密码加密)解密 
     * @param data 要解密的数据 
     * @param password 密码 
     * @param salt 盐 
     * @return 返回解密后的数据 
     */  
    public static String PBEDecrypt(String data,String password,String salt) {  
        return PBECipher( data, password, salt, Cipher.DECRYPT_MODE);  
    }  
  
    /** 
     * PBE加密解密 
     * @param data 要加密解密的信息 
     * @param password 密码 
     * @param salt 盐 
     * @param mode 加密或解密模式 
     * @return 返回加密解密后的数据 
     */  
    private static String PBECipher(String data,String password,String salt,int mode) {  
        try {  
            Key secretKey = toPBEKey(password);  
            PBEParameterSpec paramSpec = new PBEParameterSpec(TranscodeUtil.base64StrToByteArray(salt), 100);  
            Cipher cipher = Cipher.getInstance(ALGORITHM_PBE);  
            cipher.init(mode, secretKey, paramSpec);  
            return mode == Cipher.DECRYPT_MODE?new String(cipher.doFinal(TranscodeUtil.base64StrToByteArray(data))):TranscodeUtil.byteArrayToBase64Str(cipher.doFinal(data.getBytes()));  
        } catch (NoSuchAlgorithmException e) {  
            e.printStackTrace();  
        } catch (NoSuchPaddingException e) {  
            e.printStackTrace();  
        } catch (InvalidKeyException e) {  
            e.printStackTrace();  
        } catch (InvalidAlgorithmParameterException e) {  
            e.printStackTrace();  
        } catch (IllegalBlockSizeException e) {  
            e.printStackTrace();  
        } catch (BadPaddingException e) {  
            e.printStackTrace();  
        }  
        return null;  
    }  
  
    /** 
     * 生成PBEkey 
     * @param password 使用的密码 
     * @return 返回生成的PBEkey 
     */  
    private static Key toPBEKey(String password) {  
        PBEKeySpec keySpec = new PBEKeySpec(password.toCharArray());  
        try {  
            SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(ALGORITHM_PBE);  
            SecretKey secretKey = keyFactory.generateSecret(keySpec);  
            return secretKey;  
        } catch (NoSuchAlgorithmException e) {  
            e.printStackTrace();  
        } catch (InvalidKeySpecException e) {  
            e.printStackTrace();  
        }  
        return null;  
    }  
  
    /** 
     * 生成AESkey 
     * @param keySize key的位数 
     * @param seed 随机种子 
     * @return 返回base64编码后的key信息 
     */  
    public static String generateAESKey(int keySize,String seed) {  
        try {  
            KeyGenerator kgen = KeyGenerator.getInstance(KEY_AES);  
            kgen.init(keySize,new SecureRandom(seed.getBytes()));  
            SecretKey key = kgen.generateKey();  
            return TranscodeUtil.byteArrayToBase64Str(key.getEncoded());  
        } catch (NoSuchAlgorithmException e) {  
            e.printStackTrace();  
        }  
        return null;  
    }  
  
    /** 
     * AES加密 
     * @param data 要加密的数据 
     * @param key 密钥 
     * @param algorithmParameter 算法参数 
     * @return 返回加密数据 
     */  
    public static String AESEncrypt(String data,String key,String algorithmParameter) {  
        return AESCipher(data, key, algorithmParameter,Cipher.ENCRYPT_MODE);  
    }  
  
    /** 
     * AES解密 
     * @param data 要解密的数据 
     * @param key 密钥 
     * @param algorithmParameter 算法参数 
     * @return 返回解密数据 
     */  
    public static String AESDecrypt(String data,String key,String algorithmParameter) {  
        return AESCipher(data, key, algorithmParameter,Cipher.DECRYPT_MODE);  
    }  
  
    /** 
     * 实现AES加密解密 
     * @param data 要加密或解密的数据 
     * @param key 密钥 
     * @param algorithmParameter 算法参数 
     * @param mode 加密或解密 
     * @return 返回加密或解密的数据 
     */  
    private static String AESCipher(String data, String key, String algorithmParameter,int mode) {  
        try {  
            Key k = toKey(key,KEY_AES);  
            AlgorithmParameterSpec paramSpec = new IvParameterSpec(algorithmParameter.getBytes());  
            Cipher ecipher = Cipher.getInstance(ALGORITHM_AES);  
            ecipher.init(mode, k, paramSpec);  
            return mode==Cipher.DECRYPT_MODE?new String(ecipher.doFinal(TranscodeUtil.base64StrToByteArray(data))):TranscodeUtil.byteArrayToBase64Str(ecipher.doFinal(data.getBytes()));  
        } catch (NoSuchAlgorithmException e) {  
            e.printStackTrace();  
        } catch (NoSuchPaddingException e) {  
            e.printStackTrace();  
        } catch (InvalidKeyException e) {  
            e.printStackTrace();  
        } catch (InvalidAlgorithmParameterException e) {  
            e.printStackTrace();  
        } catch (IllegalBlockSizeException e) {  
            e.printStackTrace();  
        } catch (BadPaddingException e) {  
            e.printStackTrace();  
        }  
        return null;  
    }  
  
    /** 
     * 数字签名 
     * @param data 要签名的密文 
     * @param privateKey 私钥 
     * @return 返回签名信息 
     */  
    public static String RSASign(String data, String privateKey) {  
        try {  
            // 解密由base64编码的私钥  
            byte[] keyBytes = TranscodeUtil.base64StrToByteArray(privateKey);  
            // 构造PKCS8EncodedKeySpec对象  
            PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);  
            // KEY_ALGORITHM 指定的加密算法  
            KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);  
            // 取私钥匙对象  
            PrivateKey priKey = keyFactory.generatePrivate(pkcs8KeySpec);  
            // 用私钥对信息生成数字签名  
            Signature signature = Signature.getInstance(SIGNATURE_ALGORITHM);  
            signature.initSign(priKey);  
            signature.update(TranscodeUtil.base64StrToByteArray(data));  
            return TranscodeUtil.byteArrayToBase64Str(signature.sign());  
        } catch(NoSuchAlgorithmException e) {  
            e.printStackTrace();  
        } catch (InvalidKeySpecException e) {  
            e.printStackTrace();  
        } catch (InvalidKeyException e) {  
            e.printStackTrace();  
        } catch (SignatureException e) {  
            e.printStackTrace();  
        }  
        return null;  
    }  
  
    /** 
     * 验证签名 
     * @param data 要验证的密文 
     * @param publicKey 公钥 
     * @param sign 签名信息 
     * @return 返回验证成功状态 
     */  
    public static boolean RSAVerify(String data, String publicKey, String sign) {  
        try {  
            // 解密由base64编码的公钥  
            byte[] keyBytes = TranscodeUtil.base64StrToByteArray(publicKey);  
            // 构造X509EncodedKeySpec对象  
            X509EncodedKeySpec keySpec = new X509EncodedKeySpec(keyBytes);  
            // KEY_ALGORITHM 指定的加密算法  
            Signature signature;  
            KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);  
            // 取公钥匙对象  
            PublicKey pubKey = keyFactory.generatePublic(keySpec);  
            signature = Signature.getInstance(SIGNATURE_ALGORITHM);  
            signature.initVerify(pubKey);  
            signature.update(TranscodeUtil.base64StrToByteArray(data));  
            // 验证签名是否正常  
            return signature.verify(TranscodeUtil.base64StrToByteArray(sign));  
        } catch (NoSuchAlgorithmException e) {  
            e.printStackTrace();  
        } catch (InvalidKeySpecException e) {  
            e.printStackTrace();  
        } catch (InvalidKeyException e) {  
            e.printStackTrace();  
        } catch (SignatureException e) {  
            e.printStackTrace();  
        }  
        return false;  
    }  
  
    /** 
     * 私钥解密 
     * @param data 要解密的字符串 
     * @param key 私钥 
     * @return 返回解密后的字符串 
     */  
    public static String RSADecryptByPrivateKey(String data, String key) {  
        try {  
            // 对密钥解密  
            byte[] keyBytes = TranscodeUtil.base64StrToByteArray(key);  
            // 取得私钥  
            PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);  
            KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);  
            Key privateKey = keyFactory.generatePrivate(pkcs8KeySpec);  
            // 对数据解密  
            Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());  
            cipher.init(Cipher.DECRYPT_MODE, privateKey);  
            return new String(cipher.doFinal(TranscodeUtil.base64StrToByteArray(data)));  
        } catch (NoSuchAlgorithmException e) {  
            e.printStackTrace();  
        } catch (InvalidKeySpecException e) {  
            e.printStackTrace();  
        } catch (NoSuchPaddingException e) {  
            e.printStackTrace();  
        } catch (InvalidKeyException e) {  
            e.printStackTrace();  
        } catch (IllegalBlockSizeException e) {  
            e.printStackTrace();  
        } catch (BadPaddingException e) {  
            e.printStackTrace();  
        }  
        return null;  
    }  
  
    /** 
     * 公钥解密 
     * @param data 要解密的数据 
     * @param key 公钥 
     * @return 返回解密后的数据 
     */  
    public static String RSADecryptByPublicKey(String data, String key) {  
        try {  
            // 对密钥解密  
            byte[] keyBytes = TranscodeUtil.base64StrToByteArray(key);  
            // 取得公钥  
            X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);  
            KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);  
            Key publicKey = keyFactory.generatePublic(x509KeySpec);  
            // 对数据解密  
            Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());  
            cipher.init(Cipher.DECRYPT_MODE, publicKey);  
            return new String(cipher.doFinal(TranscodeUtil.base64StrToByteArray(data)));  
        } catch (NoSuchAlgorithmException e) {  
            e.printStackTrace();  
        } catch (IllegalBlockSizeException e) {  
            e.printStackTrace();  
        } catch (BadPaddingException e) {  
            e.printStackTrace();  
        } catch (InvalidKeySpecException e) {  
            e.printStackTrace();  
        } catch (InvalidKeyException e) {  
            e.printStackTrace();  
        } catch (NoSuchPaddingException e) {  
            e.printStackTrace();  
        }  
        return null;  
    }  
  
    /** 
     * 公钥加密 
     * @param data 要加密的数据 
     * @param key 公钥 
     * @return 返回加密的数据 
     */  
    public static String RSAEncryptByPublicKey(String data, String key) {  
        try {  
            // 对公钥解密  
            byte[] keyBytes = TranscodeUtil.base64StrToByteArray(key);  
            // 取得公钥  
            X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);  
            KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);  
            Key publicKey = keyFactory.generatePublic(x509KeySpec);  
            // 对数据加密  
            Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());  
            cipher.init(Cipher.ENCRYPT_MODE, publicKey);  
            return TranscodeUtil.byteArrayToBase64Str(cipher.doFinal(data.getBytes()));  
        } catch (NoSuchAlgorithmException e) {  
            e.printStackTrace();  
        } catch (InvalidKeySpecException e) {  
            e.printStackTrace();  
        } catch (NoSuchPaddingException e) {  
            e.printStackTrace();  
        } catch (InvalidKeyException e) {  
            e.printStackTrace();  
        } catch (IllegalBlockSizeException e) {  
            e.printStackTrace();  
        } catch (BadPaddingException e) {  
            e.printStackTrace();  
        }  
        return null;  
    }  
  
    /** 
     * 私钥加密 
     * @param data 要加密的数据 
     * @param key 私钥 
     * @return 返回加密后的数据 
     */  
    public static String RSAEncryptByPrivateKey(String data, String key) {  
        try {  
            // 对密钥解密  
            byte[] keyBytes = TranscodeUtil.base64StrToByteArray(key);  
            // 取得私钥  
            PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);  
            KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);  
            Key privateKey = keyFactory.generatePrivate(pkcs8KeySpec);  
            // 对数据加密  
            Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());  
            cipher.init(Cipher.ENCRYPT_MODE, privateKey);  
            return TranscodeUtil.byteArrayToBase64Str(cipher.doFinal(data.getBytes()));  
        } catch (NoSuchAlgorithmException e) {  
            e.printStackTrace();  
        } catch (InvalidKeyException e) {  
            e.printStackTrace();  
        } catch (InvalidKeySpecException e) {  
            e.printStackTrace();  
        } catch (NoSuchPaddingException e) {  
            e.printStackTrace();  
        } catch (IllegalBlockSizeException e) {  
            e.printStackTrace();  
        } catch (BadPaddingException e) {  
            e.printStackTrace();  
        }  
        return null;  
    }  
  
    /** 
     * 获得私钥 
     * @param keyMap 密钥对 
     * @return 返回经过base64编码的私钥 
     */  
    public static String getRSAPrivateKey(Map<String, Object> keyMap) {  
        Key key = (Key) keyMap.get(RSAPRIVATE_KEY);  
        return TranscodeUtil.byteArrayToBase64Str(key.getEncoded());  
    }  
  
    /** 
     * 获得公钥(base64编码) 
     * @param keyMap 密钥对 
     * @return 返回经过base64编码的公钥 
     */  
    public static String getRSAPublicKey(Map<String, Object> keyMap) {  
        Key key = (Key) keyMap.get(RSAPUBLIC_KEY);  
        return TranscodeUtil.byteArrayToBase64Str(key.getEncoded());  
    }  
  
    /** 
     * 初始化密钥对 
     * @return 返回密钥对 
     */  
    public static Map<String, Object> initRSAKey() {  
        Map<String, Object> keyMap = new HashMap<String, Object>(2);  
        try {  
            KeyPairGenerator keyPairGen = KeyPairGenerator  
                                          .getInstance(KEY_ALGORITHM);  
            keyPairGen.initialize(1024);  
            KeyPair keyPair = keyPairGen.generateKeyPair();  
            // 公钥  
            RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic();  
            // 私钥  
            RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate();  
            keyMap.put(RSAPUBLIC_KEY, publicKey);  
            keyMap.put(RSAPRIVATE_KEY, privateKey);  
        } catch (NoSuchAlgorithmException e) {  
            e.printStackTrace();  
        }  
        return keyMap;  
    }  
  
    /** 
     * 初始化甲方密钥对 
     * @return 返回甲方密钥对 
     */  
    public static Map<String, Object> initDHKey() {  
        try {  
            KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance(ALGORITHM_DH);  
            keyPairGenerator.initialize(DH_KEY_SIZE);  
            KeyPair keyPair = keyPairGenerator.generateKeyPair();  
            // 甲方公钥  
            DHPublicKey publicKey = (DHPublicKey) keyPair.getPublic();  
            // 甲方私钥  
            DHPrivateKey privateKey = (DHPrivateKey) keyPair.getPrivate();  
            Map<String, Object> keyMap = new HashMap<String, Object>(2);  
            keyMap.put(DHPUBLIC_KEY, publicKey);  
            keyMap.put(DHPRIVATE_KEY, privateKey);  
            return keyMap;  
        } catch (NoSuchAlgorithmException e) {  
            e.printStackTrace();  
        }  
        return null;  
    }  
  
    /** 
     * 使用甲方公钥初始化乙方密钥对 
     * @param key 甲方公钥 
     * @return 返回乙方密钥对 
     */  
    public static Map<String, Object> initDHKey(String key) {  
        try {  
            // 解析甲方公钥  
            byte[] keyBytes = TranscodeUtil.base64StrToByteArray(key);  
            X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);  
            KeyFactory keyFactory = KeyFactory.getInstance(ALGORITHM_DH);  
            PublicKey pubKey = keyFactory.generatePublic(x509KeySpec);  
            // 由甲方公钥构建乙方密钥  
            DHParameterSpec dhParamSpec = ((DHPublicKey) pubKey).getParams();  
            KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance(keyFactory.getAlgorithm());  
            keyPairGenerator.initialize(dhParamSpec);  
            KeyPair keyPair = keyPairGenerator.generateKeyPair();  
            // 乙方公钥  
            DHPublicKey publicKey = (DHPublicKey) keyPair.getPublic();  
            // 乙方私钥  
            DHPrivateKey privateKey = (DHPrivateKey) keyPair.getPrivate();  
            Map<String, Object> keyMap = new HashMap<String, Object>(2);  
            keyMap.put(DHPUBLIC_KEY, publicKey);  
            keyMap.put(DHPRIVATE_KEY, privateKey);  
            return keyMap;  
        } catch (NoSuchAlgorithmException e) {  
            e.printStackTrace();  
        } catch (InvalidKeySpecException e) {  
            e.printStackTrace();  
        } catch (InvalidAlgorithmParameterException e) {  
            e.printStackTrace();  
        }  
        return null;  
    }  
  
    /** 
     * DH加密 
     * @param data 要加密的数据 
     * @param publicKey 甲方或乙方公钥 
     * @param privateKey 甲方或乙方私钥 
     * @return 加密结果 
     */  
    public static String DHEncrypt(String data, String publicKey,String privateKey) {  
        try {  
            // 生成本地密钥  
            SecretKey secretKey = getDHSecretKey(publicKey, privateKey);  
            // 数据加密  
            Cipher cipher = Cipher.getInstance(secretKey.getAlgorithm());  
            cipher.init(Cipher.ENCRYPT_MODE, secretKey);  
            return TranscodeUtil.byteArrayToBase64Str(cipher.doFinal(data.getBytes()));  
        } catch (NoSuchAlgorithmException e) {  
            e.printStackTrace();  
        } catch (NoSuchPaddingException e) {  
            e.printStackTrace();  
        } catch (InvalidKeyException e) {  
            e.printStackTrace();  
        } catch (IllegalBlockSizeException e) {  
            e.printStackTrace();  
        } catch (BadPaddingException e) {  
            e.printStackTrace();  
        }  
        return null;  
    }  
  
    /** 
     * DH解密 
     * @param data 要解密的数据 
     * @param publicKey 公钥 
     * @param privateKey 私钥 
     * @return 返回解密结果 
     */  
    public static String DHDecrypt(String data, String publicKey,String privateKey) {  
        try {  
            // 生成本地密钥  
            SecretKey secretKey = getDHSecretKey(publicKey, privateKey);  
            // 数据解密  
            Cipher cipher = Cipher.getInstance(secretKey.getAlgorithm());  
            cipher.init(Cipher.DECRYPT_MODE, secretKey);  
            return new String(cipher.doFinal(TranscodeUtil.base64StrToByteArray(data)));  
        } catch (NoSuchAlgorithmException e) {  
            e.printStackTrace();  
        } catch (NoSuchPaddingException e) {  
            e.printStackTrace();  
        } catch (InvalidKeyException e) {  
            e.printStackTrace();  
        } catch (IllegalBlockSizeException e) {  
            e.printStackTrace();  
        } catch (BadPaddingException e) {  
            e.printStackTrace();  
        }  
        return null;  
    }  
  
    /** 
     * 生成本地密钥 
     * @param publicKey 公钥 
     * @param privateKey 私钥 
     * @return 返回本地密钥 
     */  
    private static SecretKey getDHSecretKey(String publicKey, String privateKey) {  
        try {  
            // 初始化公钥  
            byte[] pubKeyBytes = TranscodeUtil.base64StrToByteArray(publicKey);  
            KeyFactory keyFactory = KeyFactory.getInstance(ALGORITHM_DH);  
            X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(pubKeyBytes);  
            PublicKey pubKey = keyFactory.generatePublic(x509KeySpec);  
            // 初始化私钥  
            byte[] priKeyBytes = TranscodeUtil.base64StrToByteArray(privateKey);  
            PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(priKeyBytes);  
            Key priKey = keyFactory.generatePrivate(pkcs8KeySpec);  
            KeyAgreement keyAgree = KeyAgreement.getInstance(keyFactory.getAlgorithm());  
            keyAgree.init(priKey);  
            keyAgree.doPhase(pubKey, true);  
            // 生成本地密钥  
            SecretKey secretKey = keyAgree.generateSecret(SECRET_ALGORITHM);  
            return secretKey;  
        } catch (NoSuchAlgorithmException e) {  
            e.printStackTrace();  
        } catch (InvalidKeySpecException e) {  
            e.printStackTrace();  
        } catch (InvalidKeyException e) {  
            e.printStackTrace();  
        }  
        return null;  
    }  
  
    /** 
     * 获取私钥 
     * @param keyMap 密钥对 
     * @return 返回base64编码的私钥 
     */  
    public static String getDHPrivateKey(Map<String, Object> keyMap) {  
        Key key = (Key) keyMap.get(DHPRIVATE_KEY);  
        return TranscodeUtil.byteArrayToBase64Str(key.getEncoded());  
    }  
  
    /** 
     * 获取公钥 
     * @param keyMap 密钥对 
     * @return 返回base64编码的公钥 
     */  
    public static String getDHPublicKey(Map<String, Object> keyMap) {  
        Key key = (Key) keyMap.get(DHPUBLIC_KEY);  
        return TranscodeUtil.byteArrayToBase64Str(key.getEncoded());  
    }  
  
    /** 
     * 获取私钥 
     * @param keyStorePath keystore文件路径 
     * @param alias 别名 
     * @param password 密码 
     * @return 返回私钥 
     */  
    private static PrivateKey getKeyStorePrivateKey(String keyStorePath, String alias,String password) {  
        try {  
            KeyStore ks = getKeyStore(keyStorePath, password);  
            PrivateKey key = (PrivateKey) ks.getKey(alias, password.toCharArray());  
            return key;  
        } catch (UnrecoverableKeyException e) {  
            e.printStackTrace();  
        } catch (KeyStoreException e) {  
            e.printStackTrace();  
        } catch (NoSuchAlgorithmException e) {  
            e.printStackTrace();  
        }  
        return null;  
    }  
  
    /** 
     * 获取公钥 
     * @param certificatePath 证书文件路径 
     * @return 返回公钥 
     */  
    private static PublicKey getCertificatePublicKey(String certificatePath) {  
        try {  
            Certificate certificate = getCertificate(certificatePath);  
            PublicKey key = certificate.getPublicKey();  
            return key;  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
        return null;  
    }  
  
    /** 
     * 加载证书文件 
     * @param certificatePath 证书文件路径 
     * @return 返回证书 
     */  
    private static Certificate getCertificate(String certificatePath) {  
        try {  
            CertificateFactory certificateFactory = CertificateFactory.getInstance(X509);  
            FileInputStream in = new FileInputStream(certificatePath);  
            Certificate certificate = certificateFactory.generateCertificate(in);  
            in.close();  
            return certificate;  
        } catch (CertificateException e) {  
            e.printStackTrace();  
        } catch (FileNotFoundException e) {  
            e.printStackTrace();  
        } catch (IOException e) {  
            e.printStackTrace();  
        }  
        return null;  
    }  
  
    /** 
     * 获取证书 
     * @param keyStorePath keystore文件路径 
     * @param alias 别名 
     * @param password 密码 
     * @return 返回证书 
     */  
    private static Certificate getCertificate(String keyStorePath,String alias, String password) {  
        try {  
            KeyStore ks = getKeyStore(keyStorePath, password);  
            Certificate certificate = ks.getCertificate(alias);  
            return certificate;  
        } catch (KeyStoreException e) {  
            e.printStackTrace();  
        }  
        return null;  
    }  
  
    /** 
     * 加载KeyStore文件 
     * @param keyStorePath keystore文件地址 
     * @param password keystore密码 
     * @return 返回KeyStore 
     */  
    private static KeyStore getKeyStore(String keyStorePath, String password) {  
        try {  
            FileInputStream is = new FileInputStream(keyStorePath);  
            KeyStore ks = KeyStore.getInstance(KEY_STORE);  
            ks.load(is, password.toCharArray());  
            is.close();  
            return ks;  
        } catch (FileNotFoundException e) {  
            e.printStackTrace();  
        } catch (KeyStoreException e) {  
            e.printStackTrace();  
        } catch (NoSuchAlgorithmException e) {  
            e.printStackTrace();  
        } catch (CertificateException e) {  
            e.printStackTrace();  
        } catch (IOException e) {  
            e.printStackTrace();  
        }  
        return null;  
    }  
  
    /** 
     * 加密数据 
     * @param data 要加密的数据 
     * @param keyStorePath keystore路径 
     * @param alias 别名 
     * @param password 密码 
     * @return 返回加密后的数据 
     */  
    public static String encryptByPrivateKey(String data, String keyStorePath,  
            String alias, String password) {  
        try {  
            // 取得私钥  
            PrivateKey privateKey = getKeyStorePrivateKey(keyStorePath, alias, password);  
            // 对数据加密  
            Cipher cipher = Cipher.getInstance(privateKey.getAlgorithm());  
            cipher.init(Cipher.ENCRYPT_MODE, privateKey);  
            return TranscodeUtil.byteArrayToBase64Str(cipher.doFinal(data.getBytes()));  
        } catch (NoSuchAlgorithmException e) {  
            e.printStackTrace();  
        } catch (NoSuchPaddingException e) {  
            e.printStackTrace();  
        } catch (InvalidKeyException e) {  
            e.printStackTrace();  
        } catch (IllegalBlockSizeException e) {  
            e.printStackTrace();  
        } catch (BadPaddingException e) {  
            e.printStackTrace();  
        }  
        return null;  
    }  
  
    /** 
     * 私钥解密 
     * @param data 要解密的数据 
     * @param keyStorePath keystore路径 
     * @param alias 别名 
     * @param password 密码 
     * @return 返回解密后的数据 
     */  
    public static String decryptByPrivateKey(String data, String keyStorePath,String alias, String password) {  
        try {  
            // 取得私钥  
            PrivateKey privateKey = getKeyStorePrivateKey(keyStorePath, alias, password);  
            // 对数据加密  
            Cipher cipher = Cipher.getInstance(privateKey.getAlgorithm());  
            cipher.init(Cipher.DECRYPT_MODE, privateKey);  
            return new String(cipher.doFinal(TranscodeUtil.base64StrToByteArray(data)));  
        } catch (NoSuchAlgorithmException e) {  
            e.printStackTrace();  
        } catch (NoSuchPaddingException e) {  
            e.printStackTrace();  
        } catch (InvalidKeyException e) {  
            e.printStackTrace();  
        } catch (IllegalBlockSizeException e) {  
            e.printStackTrace();  
        } catch (BadPaddingException e) {  
            e.printStackTrace();  
        }  
        return null;  
    }  
  
    /** 
     * 私钥加密 
     * @param data 要加密的数据 
     * @param certificatePath 证书路径 
     * @return 返回加密后的信息 
     */  
    public static String encryptByPublicKey(String data, String certificatePath) {  
        try {  
            // 取得公钥  
            PublicKey publicKey = getCertificatePublicKey(certificatePath);  
            // 对数据加密  
            Cipher cipher = Cipher.getInstance(publicKey.getAlgorithm());  
            cipher.init(Cipher.ENCRYPT_MODE, publicKey);  
            return TranscodeUtil.byteArrayToBase64Str(cipher.doFinal(data.getBytes()));  
        } catch (NoSuchAlgorithmException e) {  
            e.printStackTrace();  
        } catch (NoSuchPaddingException e) {  
            e.printStackTrace();  
        } catch (InvalidKeyException e) {  
            e.printStackTrace();  
        } catch (IllegalBlockSizeException e) {  
            e.printStackTrace();  
        } catch (BadPaddingException e) {  
            e.printStackTrace();  
        }  
        return null;  
    }  
  
    /** 
     * 公钥解密 
     * @param data 要解密的数据 
     * @param certificatePath 证书路径 
     * @return 返回解密信息 
     */  
    public static String decryptByPublicKey(String data, String certificatePath) {  
        try {  
            // 取得公钥  
            PublicKey publicKey = getCertificatePublicKey(certificatePath);  
            // 对数据加密  
            Cipher cipher = Cipher.getInstance(publicKey.getAlgorithm());  
            cipher.init(Cipher.DECRYPT_MODE, publicKey);  
            return new String(cipher.doFinal(TranscodeUtil.base64StrToByteArray(data)));  
        } catch (NoSuchAlgorithmException e) {  
            e.printStackTrace();  
        } catch (NoSuchPaddingException e) {  
            e.printStackTrace();  
        } catch (InvalidKeyException e) {  
            e.printStackTrace();  
        } catch (IllegalBlockSizeException e) {  
            e.printStackTrace();  
        } catch (BadPaddingException e) {  
            e.printStackTrace();  
        }  
        return null;  
    }  
  
    /** 
     * 验证证书是否过期 
     * @param certificatePath 证书路径 
     * @return 返回验证结果 
     */  
    public static boolean verifyCertificate(String certificatePath) {  
        return verifyCertificate(new Date(), certificatePath);  
    }  
  
    /** 
     * 验证证书是否过期 
     * @param date 日期 
     * @param certificatePath 证书路径 
     * @return 返回验证结果 
     */  
    public static boolean verifyCertificate(Date date, String certificatePath) {  
        boolean status = true;  
        try {  
            // 取得证书  
            Certificate certificate = getCertificate(certificatePath);  
            // 验证证书是否过期或无效  
            status = verifyCertificate(date, certificate);  
        } catch (Exception e) {  
            status = false;  
        }  
        return status;  
    }  
  
    /** 
     * 验证证书是否过期 
     * @param date 日期 
     * @param certificate 证书 
     * @return 返回验证结果 
     */  
    private static boolean verifyCertificate(Date date, Certificate certificate) {  
        boolean status = true;  
        try {  
            X509Certificate x509Certificate = (X509Certificate) certificate;  
            x509Certificate.checkValidity(date);  
        } catch (Exception e) {  
            status = false;  
        }  
        return status;  
    }  
  
    /** 
     * 对于数据进行签名 
     * @param sign 要签名的信息 
     * @param keyStorePath keystore文件位置 
     * @param alias 别名 
     * @param password 密码 
     * @return 返回签名信息 
     */  
    public static String sign(String sign, String keyStorePath, String alias,String password) {  
        try {  
            // 获得证书  
            X509Certificate x509Certificate = (X509Certificate) getCertificate(  
                                                  keyStorePath, alias, password);  
            // 获取私钥  
            KeyStore ks = getKeyStore(keyStorePath, password);  
            // 取得私钥  
            PrivateKey privateKey = (PrivateKey) ks.getKey(alias, password  
                                    .toCharArray());  
            // 构建签名  
            Signature signature = Signature.getInstance(x509Certificate  
                                  .getSigAlgName());  
            signature.initSign(privateKey);  
            signature.update(TranscodeUtil.base64StrToByteArray(sign));  
            return TranscodeUtil.byteArrayToBase64Str(signature.sign());  
        } catch (UnrecoverableKeyException e) {  
            e.printStackTrace();  
        } catch (KeyStoreException e) {  
            e.printStackTrace();  
        } catch (NoSuchAlgorithmException e) {  
            e.printStackTrace();  
        } catch (InvalidKeyException e) {  
            e.printStackTrace();  
        } catch (SignatureException e) {  
            e.printStackTrace();  
        }  
        return null;  
    }  
  
    /** 
     * 验证签名信息 
     * @param data 要验证的信息 
     * @param sign 签名信息 
     * @param certificatePath 证书路径 
     * @return 返回验证结果 
     */  
    public static boolean verify(String data, String sign,String certificatePath) {  
        try {  
            // 获得证书  
            X509Certificate x509Certificate = (X509Certificate) getCertificate(certificatePath);  
            // 获得公钥  
            PublicKey publicKey = x509Certificate.getPublicKey();  
            // 构建签名  
            Signature signature = Signature.getInstance(x509Certificate  
                                  .getSigAlgName());  
            signature.initVerify(publicKey);  
            signature.update(TranscodeUtil.base64StrToByteArray(data));  
            return signature.verify(TranscodeUtil.base64StrToByteArray(sign));  
        } catch (NoSuchAlgorithmException e) {  
            e.printStackTrace();  
        } catch (InvalidKeyException e) {  
            e.printStackTrace();  
        } catch (SignatureException e) {  
            e.printStackTrace();  
        }  
        return false;  
    }  
  
    /** 
     * 验证证书 
     * @param date 日期 
     * @param keyStorePath keystore文件路径 
     * @param alias 别名 
     * @param password 密码 
     * @return 返回验证结果 
     */  
    public static boolean verifyCertificate(Date date, String keyStorePath,  
                                            String alias, String password) {  
        boolean status = true;  
        try {  
            Certificate certificate = getCertificate(keyStorePath, alias,  
                                      password);  
            status = verifyCertificate(date, certificate);  
        } catch (Exception e) {  
            status = false;  
        }  
        return status;  
    }  
  
    /** 
     * 验证证书 
     * @param keyStorePath keystore文件路径 
     * @param alias 别名 
     * @param password 密码 
     * @return 返回验证结果 
     */  
    public static boolean verifyCertificate(String keyStorePath, String alias,  
                                            String password) {  
        return verifyCertificate(new Date(), keyStorePath, alias, password);  
    }  
  
}  
